title: Naphthalimide intercalators with chiral amino side chains: effects of chirality on DNA binding, photodamage and antitumor cytotoxicity.
abstract: Several novel heterocyclic-fused naphthalimides intercalators with chiral amino side chains were investigated. Their side chains' chiral configuration determines DNA binding activities in the order: S-enantiomers > R-enantiomers. And their DNA photodamaging activities were in good agreement with their DNA binding constants, the S-enantiomers could photocleave circular supercoiled pBR322 DNA more efficiently than their R-enantiomers. S-enantiomer B(3) could photodamage DNA at 0.2 microM and cleave supercoiled plasmid DNA from form I to form II completely at 50 microM. Almost all of these intercalators showed effective cytoxicities against human lung cancer cells and murine leukemia cells. S-enantiomers showed different antitumor cytotoxicity by comparison with R-enantiomers. This work may provide additional information for the role of amino side chains on intercalators as antitumor agents.
authors.affiliation: Department of Bioscience and Biotechnology, Dalian University of Technology, No. 2 Linggong Road, Ganjingzi, Dalian, Liaoning Province 116012, China. qingyang@dlut.edu.cn
authors.forename: Qing
authors.initials: Q
authors.lastname: Yang
authors.forename: Peng
authors.initials: P
authors.lastname: Yang
authors.forename: Xuhong
authors.initials: X
authors.lastname: Qian
authors.forename: Lianpeng
authors.initials: L
authors.lastname: Tong
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000737:chemistry / Q000494:pharmacology; D004247:DNA / Q000737:chemistry* / Q000187:drug effects*; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D007364:Intercalating Agents / Q000494:pharmacology*; D051379:Mice; D015394:Molecular Structure; D053644:Naphthalimides / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D013237:Stereoisomerism; D013329:Structure-Activity Relationship
chemical_list: D000970:Antineoplastic Agents; D007364:Intercalating Agents; D053644:Naphthalimides; D004247:DNA